public PlayAudio(VoiceService voices, int frameSize, RemoteVoice user)
{
Voices = voices;
User = user;
CallbackHandler = new WinMM.WaveDelegate(WaveCallback);
FrameSize = frameSize;
int sampleRate = 0;
// if 20ms, at high quality (16khz) is 320 samples at 2 bytes each
if (FrameSize == 320)
{
sampleRate = 16000;
BufferSize = 320 * 2 * 2; // 2 bytes each frame, 2 channels
SpeexMode = Speex.SPEEX_MODEID_WB;
}
else if (FrameSize == 160)
{
sampleRate = 8000;
BufferSize = 160 * 2 * 2;
SpeexMode = Speex.SPEEX_MODEID_NB;
}
else
{
Dispose();
return;
}
try
{
// init speex
Speex.speex_bits_init(ref DecodeBits);
IntPtr modePtr = Speex.speex_lib_get_mode(SpeexMode);
SpeexDecoder = Speex.speex_decoder_init(modePtr);
int tmp = 1;
Speex.speex_decoder_ctl(SpeexDecoder, Speex.SPEEX_SET_ENH, ref tmp);
// init wave
Format = new WinMM.WaveFormat(sampleRate, 16, 2);
WinMM.ErrorCheck(WinMM.waveOutOpen(out WaveHandle, Voices.PlaybackDevice, Format, CallbackHandler, 0, WinMM.CALLBACK_FUNCTION));
for (int i = 0; i < BufferCount; i++)
{
Buffers[i] = new PlayBuffer(i, WaveHandle, BufferSize);
}
}
catch (Exception ex)
{
Dispose();
Voices.Core.Network.UpdateLog("Voice", "Error starting playing: " + ex.Message);
}
}
public void Dispose()
{
if (HeaderHandle.IsAllocated)
{
WinMM.ErrorCheck(WinMM.waveOutUnprepareHeader(WaveHandle, ref Header, Marshal.SizeOf(Header)));
HeaderHandle.Free();
}
if (DataHandle.IsAllocated)
{
DataHandle.Free();
}
}
public PlayBuffer(int index, IntPtr handle, int size)
{
WaveHandle = handle;
HeaderHandle = GCHandle.Alloc(Header, GCHandleType.Pinned);
Data = new byte[size];
DataHandle = GCHandle.Alloc(Data, GCHandleType.Pinned);
DataPtr = DataHandle.AddrOfPinnedObject();
//Header.dwUser = new IntPtr(index); //(IntPtr)GCHandle.Alloc(this);
Header.lpData = DataHandle.AddrOfPinnedObject();
Header.dwBufferLength = size;
WinMM.ErrorCheck(WinMM.waveOutPrepareHeader(WaveHandle, ref Header, Marshal.SizeOf(Header)));
}
//public IntPtr EchoState;
public RecordAudio(VoiceService voices)
{
Voices = voices;
CallbackHandler = new WinMM.WaveDelegate(WaveCallback);
// if 20ms, at high quality (16khz) is 320 samples at 2 bytes each
if (HighQuality)
{
SampleRate = 16000;
BufferSize = 320 * 2;
SpeexMode = Speex.SPEEX_MODEID_WB;
}
else
{
SampleRate = 8000;
BufferSize = 160 * 2;
SpeexMode = Speex.SPEEX_MODEID_NB;
}
//LastBuffer = new byte[BufferSize];
try
{
InitSpeexEncoder();
Format = new WinMM.WaveFormat(SampleRate, 16, 1);
WinMM.ErrorCheck(WinMM.waveInOpen(out WaveHandle, Voices.RecordingDevice, Format, CallbackHandler, 0, WinMM.CALLBACK_FUNCTION));
for (int i = 0; i < BufferCount; i++)
{
Buffers[i] = new RecordBuffer(i, WaveHandle, BufferSize);
}
WinMM.ErrorCheck(WinMM.waveInStart(WaveHandle));
}
catch (Exception ex)
{
Dispose();
Voices.Core.Network.UpdateLog("Voice", "Error starting recording: " + ex.Message);
}
}
public void Dispose()
{
try
{
WinMM.ErrorCheck(WinMM.waveOutReset(WaveHandle));
// free buffers
foreach (PlayBuffer buffer in Buffers)
{
buffer.Dispose();
}
Buffers = null;
// free speex
Speex.speex_bits_destroy(ref DecodeBits);
Speex.speex_decoder_destroy(SpeexDecoder);
WinMM.ErrorCheck(WinMM.waveOutClose(WaveHandle));
}
catch (Exception ex)
{
Voices.Core.Network.UpdateLog("Voice", "Error Disposing Player: " + ex.Message);
}
// remove wave out stream from user structure
foreach (ulong routing in User.Streams.Keys)
{
if (User.Streams[routing] == this)
{
User.Streams.Remove(routing);
break;
}
}
Voices.Players.SafeRemove(this);
}
public void ProcessBuffers()
{
try
{
while (FilledBuffers < BufferCount)
{
byte[] data = null;
lock (AudioQueue) // either gets called from core, or system thread
{
if (AudioQueue.Count == 0)
{
return;
}
data = AudioQueue.Dequeue();
}
// keep a log of received audio that user can back track through
lock (History)
{
History.Enqueue(data);
while (History.Count > HistoryLength)
{
History.Dequeue();
}
}
// decode
Speex.speex_bits_reset(ref DecodeBits);
Speex.speex_bits_read_from(ref DecodeBits, data, data.Length);
byte[] mono = new byte[FrameSize * 2];
int success = Speex.speex_decode_int(SpeexDecoder, ref DecodeBits, mono);
if (success != 0)
{
continue;
}
// cancel echo
//if (Voices.Recorder != null && FrameSize == Voices.Recorder.FrameSize)
// Speex.speex_echo_playback(Voices.Recorder.EchoState, mono);
// get volume
short maxVolume = 0;
for (int i = 0; i < mono.Length / 2; i++)
{
short val = BitConverter.ToInt16(mono, i * 2);
if (val > maxVolume)
{
maxVolume = val;
}
}
if (maxVolume > User.VolumeIn)
{
User.VolumeIn = maxVolume;
}
// find out where audio should come out from, if at all
// return down here so that even if user not listening, window shows volume bar
AudioDirection direction = User.GetDirection();
if (direction == AudioDirection.None)
{
continue;
}
// shifting to one side
PlayBuffer buffer = Buffers[NextBuffer];
for (int i = 0; i < mono.Length / 2; i++)
{
switch (direction)
{
case AudioDirection.Both:
Buffer.BlockCopy(mono, i * 2, buffer.Data, i * 4, 2); // left
Buffer.BlockCopy(mono, i * 2, buffer.Data, i * 4 + 2, 2); // right
break;
case AudioDirection.Left:
Buffer.BlockCopy(mono, i * 2, buffer.Data, i * 4, 2); // left
break;
case AudioDirection.Right:
Buffer.BlockCopy(mono, i * 2, buffer.Data, i * 4 + 2, 2); // right
break;
}
}
WinMM.ErrorCheck(WinMM.waveOutWrite(WaveHandle, ref buffer.Header, Marshal.SizeOf(buffer.Header)));
FilledBuffers++;
NextBuffer++;
if (NextBuffer >= BufferCount)
{
NextBuffer = 0;
}
}
}
catch (Exception ex)
{
Voices.Core.RunInCoreAsync(() =>
{
Dispose();
Voices.Core.Network.UpdateLog("Voice", "Error filling buffers: " + ex.Message);
});
}
}
public void ProcessBuffers()
{
try
{
while (AddedBuffers < BufferCount)
{
RecordBuffer buffer = Buffers[NextBuffer];
if (buffer.Added)
{
EncodeAudio(buffer);
}
/*if (!EncodeAudio(buffer) && LastBufferSet)
* {
* // no data sent - send last buffer so that audio doesnt snap, but fades out
* // reverse - so waves match up
* byte[] frame = new byte[2];
* int backpos = 0;
* for (int i = 0; i < FrameSize / 2; i++)
* {
* backpos = LastBuffer.Length - 2 - i * 2;
* Buffer.BlockCopy(LastBuffer, i * 2, frame, 0, 2); // front to temp
* Buffer.BlockCopy(LastBuffer, backpos, LastBuffer, i * 2, 2); // back to front
* Buffer.BlockCopy(frame, 0, LastBuffer, backpos, 2); // temp to back
* }
*
* // fade so no sharp end to the sound
* for (int i = 0; i < FrameSize; i++)
* {
* short value = BitConverter.ToInt16(LastBuffer, i * 2);
* value = (short) (value * (FrameSize - i) / FrameSize);
* BitConverter.GetBytes(value).CopyTo(LastBuffer, i * 2);
* }
*
* LastBuffer.CopyTo(buffer.Data, 0);
*
* int tmp = 0;
* Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_VAD, ref tmp);
* Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_DTX, ref tmp);
*
* //EncodeAudio(buffer);
*
* tmp = 1;
* Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_VAD, ref tmp);
* Speex.speex_encoder_ctl(SpeexEncoder, Speex.SPEEX_SET_DTX, ref tmp);
*
*
* LastBufferSet = false;
* }*/
WinMM.ErrorCheck(WinMM.waveInAddBuffer(WaveHandle, ref buffer.Header, Marshal.SizeOf(buffer.Header)));
buffer.Added = true;
NextBuffer++;
if (NextBuffer >= BufferCount)
{
NextBuffer = 0;
}
AddedBuffers++;
}
}
catch (Exception ex)
{
Debug.Assert(false);
Voices.Core.RunInCoreAsync(() =>
{
Voices.Core.Network.UpdateLog("Voice", "Error in record thread: " + ex.Message);
Dispose();
});
}
}
public void WaveCallback(IntPtr hdrvr, int uMsg, int dwUser, ref WinMM.WaveHdr wavhdr, int dwParam2)
{
if (uMsg == WinMM.MM_WIM_DATA)
{
// use dwUser parameter of header to keep buffers in sync?
// doesnt seem like buffers are getting out of sync at all
AddedBuffers--;
Voices.AudioEvent.Set();
}
}
public void WaveCallback(IntPtr hdrvr, int uMsg, int dwUser, ref WinMM.WaveHdr wavhdr, int dwParam2)
{
if (uMsg == WinMM.MM_WOM_DONE)
{
FilledBuffers--;
Voices.AudioEvent.Set();
}
}